Intensity-only optical compressive imaging using a multiply scattering material and a double phase retrieval approach

TL;DR

This paper introduces a novel intensity-only optical compressive imaging method that employs a multiply scattering medium and a double phase retrieval algorithm to reconstruct images from intensity measurements, demonstrated on MNIST digits.

Contribution

The paper presents a new phase retrieval algorithm tailored for intensity-only measurements and binary input patterns, enabling effective transmission matrix estimation and image reconstruction in scattering media.

Findings

Successful experimental reconstruction of MNIST digits

Effective calibration of scattering medium using binary DMD patterns

Promising results demonstrating the feasibility of intensity-only compressive imaging

Abstract

In this paper, the problem of compressive imaging is addressed using natural randomization by means of a multiply scattering medium. To utilize the medium in this way, its corresponding transmission matrix must be estimated. To calibrate the imager, we use a digital micromirror device (DMD) as a simple, cheap, and high-resolution binary intensity modulator. We propose a phase retrieval algorithm which is well adapted to intensity-only measurements on the camera, and to the input binary intensity patterns, both to estimate the complex transmission matrix as well as image reconstruction. We demonstrate promising experimental results for the proposed algorithm using the MNIST dataset of handwritten digits as example images.